# Preferred way to construct block matrices with exact Dirichlet BC (tgv = -1)?

**URL:** <https://community.freefem.org/t/preferred-way-to-construct-block-matrices-with-exact-dirichlet-bc-tgv-1/222>\
**Category:** General Discussion\
**Created:** [January 14, 2020, 4:22pm UTC](https://community.freefem.org/t/preferred-way-to-construct-block-matrices-with-exact-dirichlet-bc-tgv-1/222 "2020-01-14T16:22:42Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![arousta](https://avatars.discourse-cdn.com/v4/letter/a/838e76/32.png) [@arousta](https://community.freefem.org/u/arousta)\
**Post date:** [January 15, 2020, 11:14am UTC](https://community.freefem.org/t/preferred-way-to-construct-block-matrices-with-exact-dirichlet-bc-tgv-1/222/3 "2020-01-15T11:14:21Z")

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Also relevant, look at this post:  
[https://community.freefem.org/t/implementation-of-dirichlet-boundary-condition-when-tgv-1/113](https://community.freefem.org/t/implementation-of-dirichlet-boundary-condition-when-tgv-1/113)

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